I think there is a small fuse in the box under the joysticks could be blown.
There may also be an auto resettable breaker on your firewall that has failed.
On mine when it starts giving me a hard time I may have to reset the emergency brake several times then it works OK.
Let us know what you find once fixed.
I have not done the R&R but I did read one one good piece of advice I will pass on.
A poster said he saved a lot of time & grief by pulling the heads before pulling the engine it made good sense to me trying to get it out the door.
I think you can pull the heads from the wheel wells.
Just a thought.
You did not say what kind of generator but most have 2 breakers on the side of the gen set and turning the generator off or on can trip the breakers or in my case they just trip sometimes on shutdown.
On the transfer switch sometimes the contacts stick and a rap on the box with the handle of a screwdriver will free them up.
One of them is for the steps the other may be levelers.
The problem is the contacts may be rusted closed so if you do have a short the breaker will not open and could cause a fire.
The safest thing to do is replace them I suspect they are 40 to 50amp breakers.
I guess a lot has to do with your expectations I have stayed at what some would say is a "terrible" campground but I was only staying overnight and was wanting electric for AC and a feeling of security. Easy enough to head for the next CG if it is not secure.
My expectations go up for a detestation campground things like level lot, picnic table, more than 5ft between sites, etc.
On the other hand I have been surprised by some exceptional parks for an overnighter and wished I had more time to stay over.
I just can't imagine not a single decent campground in 5,000 miles of travel.
Try Colaws for a used step or any RV salvage yard.
If the rig is prewired and predrilled for the steps no problem.
Otherwise a 50amp breaker, running the wires, installing door switches and installation of the steps.
Could be a PITA but doable.